
Determinação da % Gorduras do queijo
Authored by Fábio Iachel da Silva
Chemistry
10th Grade

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8 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Qual é a quantidade exata de amostra que deve ser pesada para a análise?
1 g
2 g
3 g
4 g
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Por que é importante pesar exatamente 3 g de amostra?
Para facilitar a centrifugação
Para garantir a precisão do cálculo
Para reduzir o tempo de análise
Para evitar a evaporação do reagente
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Qual é a densidade do ácido sulfúrico utilizado na metodologia oficial?
1515 a 1520
1520 a 1525
1525 a 1530
1517 a 1527
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Qual reagente é volátil e tóxico, necessitando de capela de exaustão?
Álcool isoamílico
Ácido clorídrico
Ácido sulfúrico
Água quente
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Quantos mililitros de ácido sulfúrico são adicionados inicialmente?
20 ml
5 ml
10 ml
15 ml
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Qual é a temperatura do banho-maria utilizado na digestão da amostra?
50ºC
55ºC
60ºC
65ºC
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Quantos minutos a amostra fica no banho-maria antes de ser agitada levemente?
3 minutos
2 minutos
10 minutos
5 minutos
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